Abstract
The freeze-cracking technique was applied to chop and divide cell randomly in root meristems of Drosera falconeri into two pieces and obtain ultrastructural information on chromosomes, nucleoli, mitotic spindles and their attached sites on chromosomes as well as the poles. Certain phenomenon on diffused-centromeric chromosomes were found to strongly support Kondo's hypothesis on “diffused-centromeres in Drosera chromosomes.” The mitotic spindles were 60~90 nm diameter at many separate portions on a poleward side of prometaphase and metaphase chromosomes.
